References

1. A. M. Michelson, The Chemistry of Nucleosides and Nucleotides. Academic Press, N.Y -London (1963).
2. R. K. Robins, Purines and Related Cyclic Systems, in: Heterocyclic Compounds. Vol. 8,
R. C. Elderfield (Ed.), John Wiley & Sons, Inc., N.Y.-London-Sydney (1967).
3. G. Kenner and A. Todd, Pyrimidine and Its Derivatives, in: Heterocyclic Compounds. Vol. 6, R. C. Elderfield (Ed.), John Wiley & Sons, Inc., New York (1960).
4. T. L. V Ulbricht, in: Comprehensive Biochemistry. Vol. 8, M. Florkin and E. H. Stotz (Eds.), Elsevier, Amsterdam-London-N.Y, pp. 158-208 (1963).
5. D. O. Jordan, The Chemistry of Nucleic Acids. Butterworths, London-Washington, p. 358 (1960).
6. R. W Chambers, in: Progress in Nucleic Acid Res. and Mol. Biol. Vol. 5, J. N. Davidson and W E. Cohn (Eds.), Academic Press, N.Y -London, pp. 349-398 (1966).
7. J. J. Fox, K. A. Watanabe, and A. Bloch, ibid. pp. 251-313.
8. Nucleoside Analogues: Chemistry, Biology and Medical Application. R. T Walker, E. De Clercq and E Eckstein (Eds.), Plenum Press, N.Y-London (1979).
9. R. H. Hall, Modified Nucleosides in Nucleic Acids. Columbia University Press, New York, (1971).